Android-加速感測器或者OrientationEventListener做橫豎屏切換
阿新 • • 發佈：2019-01-22
在播放視訊的時候，可能要做橫豎屏的切換，但是，使用者可以設定自己的手機關掉螢幕旋轉，這個時候就需要想其他的辦法了，比如：加速感測器或者OrientationEventListener。
1、這是用加速感測器來實現：
public class ScreenSwitchUtils { private static final String TAG = ScreenSwitchUtils.class.getSimpleName(); private volatile static ScreenSwitchUtils mInstance; private Activity mActivity; // 是否是豎屏 private boolean isPortrait = true; private SensorManager sm; private OrientationSensorListener listener; private Sensor sensor; private SensorManager sm1; private Sensor sensor1; private OrientationSensorListener1 listener1; private Handler mHandler = new Handler() { public void handleMessage(Message msg) { switch (msg.what) { case 888: int orientation = msg.arg1; if (orientation > 45 && orientation < 135) { } else if (orientation > 135 && orientation < 225) { } else if (orientation > 225 && orientation < 315) { if (isPortrait) { Log.e("test", "切換成橫屏"); mActivity.setRequestedOrientation(0); isPortrait = false; } } else if ((orientation > 315 && orientation < 360) || (orientation > 0 && orientation < 45)) { if (!isPortrait) { Log.e("test","切換成豎屏"); mActivity.setRequestedOrientation(1); isPortrait = true; } } break; default: break; } }; }; /** 返回ScreenSwitchUtils單例 **/ public static ScreenSwitchUtils init(Context context) { if (mInstance == null) { synchronized (ScreenSwitchUtils.class) { if (mInstance == null) { mInstance = new ScreenSwitchUtils(context); } } } return mInstance; } private ScreenSwitchUtils(Context context) { Log.d(TAG, "init orientation listener."); // 註冊重力感應器,監聽螢幕旋轉 sm = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE); sensor = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); listener = new OrientationSensorListener(mHandler); // 根據 旋轉之後/點選全屏之後 兩者方向一致,啟用sm. sm1 = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE); sensor1 = sm1.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); listener1 = new OrientationSensorListener1(); } /** 開始監聽 */ public void start(Activity activity) { Log.d(TAG, "start orientation listener."); mActivity = activity; sm.registerListener(listener, sensor, SensorManager.SENSOR_DELAY_UI); } /** 停止監聽 */ public void stop() { Log.d(TAG, "stop orientation listener."); sm.unregisterListener(listener); sm1.unregisterListener(listener1); } /** * 手動橫豎屏切換方向 */ public void toggleScreen() { sm.unregisterListener(listener); sm1.registerListener(listener1, sensor1,SensorManager.SENSOR_DELAY_UI); if (isPortrait) { isPortrait = false; // 切換成橫屏 mActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); } else { isPortrait = true; // 切換成豎屏 mActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); } } public boolean isPortrait(){ return this.isPortrait; } /** * 重力感應監聽者 */ public class OrientationSensorListener implements SensorEventListener { private static final int _DATA_X = 0; private static final int _DATA_Y = 1; private static final int _DATA_Z = 2; public static final int ORIENTATION_UNKNOWN = -1; private Handler rotateHandler; public OrientationSensorListener(Handler handler) { rotateHandler = handler; } public void onAccuracyChanged(Sensor arg0, int arg1) { } public void onSensorChanged(SensorEvent event) { float[] values = event.values; int orientation = ORIENTATION_UNKNOWN; float X = -values[_DATA_X]; float Y = -values[_DATA_Y]; float Z = -values[_DATA_Z]; float magnitude = X * X + Y * Y; // Don't trust the angle if the magnitude is small compared to the y // value if (magnitude * 4 >= Z * Z) { // 螢幕旋轉時 float OneEightyOverPi = 57.29577957855f; float angle = (float) Math.atan2(-Y, X) * OneEightyOverPi; orientation = 90 - (int) Math.round(angle); // normalize to 0 - 359 range while (orientation >= 360) { orientation -= 360; } while (orientation < 0) { orientation += 360; } } if (rotateHandler != null) { rotateHandler.obtainMessage(888, orientation, 0).sendToTarget(); } } } public class OrientationSensorListener1 implements SensorEventListener { private static final int _DATA_X = 0; private static final int _DATA_Y = 1; private static final int _DATA_Z = 2; public static final int ORIENTATION_UNKNOWN = -1; public OrientationSensorListener1() { } public void onAccuracyChanged(Sensor arg0, int arg1) { } public void onSensorChanged(SensorEvent event) { float[] values = event.values; int orientation = ORIENTATION_UNKNOWN; float X = -values[_DATA_X]; float Y = -values[_DATA_Y]; float Z = -values[_DATA_Z]; float magnitude = X * X + Y * Y; // Don't trust the angle if the magnitude is small compared to the y // value if (magnitude * 4 >= Z * Z) { // 螢幕旋轉時 float OneEightyOverPi = 57.29577957855f; float angle = (float) Math.atan2(-Y, X) * OneEightyOverPi; orientation = 90 - (int) Math.round(angle); // normalize to 0 - 359 range while (orientation >= 360) { orientation -= 360; } while (orientation < 0) { orientation += 360; } } if (orientation > 225 && orientation < 315) {// 檢測到當前實際是橫屏 if (!isPortrait) { sm.registerListener(listener, sensor,SensorManager.SENSOR_DELAY_UI); sm1.unregisterListener(listener1); } } else if ((orientation > 315 && orientation < 360) || (orientation > 0 && orientation < 45)) {// 檢測到當前實際是豎屏 if (isPortrait) { sm.registerListener(listener, sensor,SensorManager.SENSOR_DELAY_UI); sm1.unregisterListener(listener1); } } } } }
使用的時候：
public class MainActivity extends Activity implements OnClickListener { private ScreenSwitchUtils instance; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); instance = ScreenSwitchUtils.init(this.getApplicationContext()); } @Override protected void onStart() { super.onStart(); instance.start(this); } @Override protected void onStop() { super.onStop(); instance.stop(); } @SuppressLint("NewApi") @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); Log.e("test", "onConfigurationChanged"); if (instance.isPortrait()) { // 切換成豎屏 LayoutParams params1 = new RelativeLayout.LayoutParams(screenWidth, DensityUtil.dip2px(this, 160)); videoView.setLayoutParams(params1); Toast.makeText(getApplicationContext(), "豎屏", 0).show(); Log.e("test", "豎屏"); } else { // 切換成橫屏 LayoutParams params1 = new RelativeLayout.LayoutParams(screenHeight, screenWidth); videoView.setLayoutParams(params1); Toast.makeText(getApplicationContext(), "橫屏", 0).show(); Log.e("test", "橫屏"); } } @Override public void onClick(View arg0) { switch (arg0.getId()) { case R.id.iv_stretch: instance.toggleScreen(); break; } } }
呼叫了activity.setRequestedOrientation()以後，會觸發activity.onConfigurationChanged();可以在這裡面重新設定播放介面的大小。
2.還有一種更簡單的方式OrientationEventListener：
public class ScreenOrientationUtil { private int mOrientation; private OrientationEventListener mOrEventListener; private int mOrientation1; private OrientationEventListener mOrEventListener1; private Activity mActivity; private static ScreenOrientationUtil instance = new ScreenOrientationUtil(); public static ScreenOrientationUtil getInstance(){ return instance; } public void start(Activity activity){ this.mActivity = activity; if(mOrEventListener == null){ initListener(); } mOrEventListener.enable(); } public void stop(){ if(mOrEventListener != null){ mOrEventListener.disable(); } if(mOrEventListener1 != null){ mOrEventListener1.disable(); } } private void initListener(){ mOrEventListener = new OrientationEventListener(mActivity) { @Override public void onOrientationChanged(int rotation) { Log.e("test", ""+rotation); if (rotation == OrientationEventListener.ORIENTATION_UNKNOWN) { return; } int orientation = convert2Orientation(rotation); // 方向沒有變化,跳過 if (orientation == mOrientation) { return; } mOrientation = orientation; mActivity.setRequestedOrientation(mOrientation); } }; mOrEventListener1 = new OrientationEventListener(mActivity) { @Override public void onOrientationChanged(int rotation) { if (rotation == OrientationEventListener.ORIENTATION_UNKNOWN) { return; } int orientation = convert2Orientation(rotation); // 方向沒有變化,跳過 if (orientation == mOrientation1) { return; } mOrientation1 = orientation; if(mOrientation1 == mOrientation){ mOrEventListener1.disable(); mOrEventListener.enable(); } } }; } public boolean isPortrait(){ if(mOrientation == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT || mOrientation == ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT){ return true; } return false; } public int getOrientation(){ return mOrientation; } public void toggleScreen(){ mOrEventListener.disable(); mOrEventListener1.enable(); int orientation = 0 ; if(mOrientation == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT){ orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE; }else if(mOrientation == ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE){ orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT; }else if(mOrientation == ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE){ orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT; }else if(mOrientation == ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT){ orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE; } mOrientation = orientation; mActivity.setRequestedOrientation(mOrientation); } private int convert2Orientation(int rotation){ int orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT; if (((rotation >= 0) && (rotation <= 45)) || (rotation > 315)) { orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT; } else if ((rotation > 45) && (rotation <= 135)) { orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE; } else if ((rotation > 135) && (rotation <= 225)) { orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT; } else if ((rotation > 225) && (rotation <= 315)) { orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE; } else { orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT; } return orientation; } }
貌似也可以啊！